/*
 * Copyright (c) 2011 Imre Fazekas.
 * All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * Neither the name of the Brillien nor the names of its
 * terms and concepts may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

package com.vii.brillien.core.component.io;

import com.vii.brillien.core.component.AbstractPresence;
import com.vii.brillien.ignition.BrillienContext;
import com.vii.brillien.ignition.transport.BrillienCommunication;
import com.vii.brillien.kernel.BrillienException;
import com.vii.brillien.kernel.annotations.PresenceService;
import com.vii.brillien.kernel.annotations.lifecycle.Resident;
import com.vii.brillien.kernel.axiom.transport.Communication;
import com.vii.streamline.services.reflection.ReflectionServices;
import com.vii.streamline.structures.collections.InnerList;

import java.lang.reflect.Method;
import java.util.List;
import java.util.logging.Level;

import static com.vii.streamline.services.reflection.ReflectionServices.invokeMethod;

/**
 * Logger Presence. Used in every Presence instance
 */
@PresenceService
@Resident
public class Logger <R> extends AbstractPresence<R> {

    /**
     * Java Logging Framework's Logger instance to achieve logging services
     */
    protected java.util.logging.Logger  loggerInstance;

    @Override
    public void reset() {
        super.reset();

        needToLog = false;
    }

    /**
     * Creates new Logger instance
     */
    public Logger() {
        loggerInstance = BrillienContext.mainLogger;
    }

    @Override
    protected Object invokeMessageProcessor( BrillienCommunication message ) throws BrillienException {
        try {
            String msg = getSubject( message );
            Method m = ReflectionServices.getMethod( this.getClass(), msg );

            if( message.getMessageType() == Communication.TYPE_RESULT ){
                return null;    
            }
            else if( message.getSubject().equals("presenceLog") ) {
                return invokeMethod( m, this,
                        new InnerList(
                            message.getSender(), message.getFlowID(), message.acquireParameters( m )
                        ).asArray()
                );
            } else{
                return invokeMethod( "processMessage", this, new InnerList(
                        msg,
                        message.acquireParameters( m )
                ).asArray() );
            }
        } catch (Exception e) {
            throw new BrillienException( e );
        }
    }
    
    /**
     * Logger method for presences
     * @param sender Name of the Presence requesting logging
     * @param flowID Id of the flow where the sender belongs to
     * @param params parameters of the log record
     */
    public void presenceLog( String sender, String flowID, Object... params ){
        String msg = params[0].toString();
        Level logLevel = Level.parse( params[1].toString() );

        if( interestedIn(logLevel) )
            loggerInstance.logp(
                    logLevel, sender,
                    flowID, msg, params
            );
    }

    @Override
    protected void log( String message, List<Object> parameters ){
    }

    @Override
    protected void systemlog( String message, List<Object> parameters ){
    }

    /**
     * Tells whether this logger is interested in log messages at the given level
     */
    public boolean interestedIn( Level level ){
        return level.intValue() >= loggerInstance.getLevel().intValue();
    }

}

